[FFmpeg-cvslog] avcodec/rv40: Make decoder init-threadsafe

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Fri Feb 11 14:54:13 2022 +0100| [3e0b6f42e3b354b943627a244f0cabb7be07db1b] | committer: Andreas Rheinhardt

avcodec/rv40: Make decoder init-threadsafe

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3e0b6f42e3b354b943627a244f0cabb7be07db1b
---

 libavcodec/rv40.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/libavcodec/rv40.c b/libavcodec/rv40.c
index 9cec0751e1..868d28096e 100644
--- a/libavcodec/rv40.c
+++ b/libavcodec/rv40.c
@@ -27,6 +27,7 @@
 #include "config.h"
 
 #include "libavutil/imgutils.h"
+#include "libavutil/thread.h"
 
 #include "avcodec.h"
 #include "internal.h"
@@ -555,14 +556,13 @@ static void rv40_loop_filter(RV34DecContext *r, int row)
  */
 static av_cold int rv40_decode_init(AVCodecContext *avctx)
 {
+    static AVOnce init_static_once = AV_ONCE_INIT;
     RV34DecContext *r = avctx->priv_data;
     int ret;
 
     r->rv30 = 0;
     if ((ret = ff_rv34_decode_init(avctx)) < 0)
         return ret;
-    if(!aic_top_vlc.bits)
-        rv40_init_tables();
     r->parse_slice_header = rv40_parse_slice_header;
     r->decode_intra_types = rv40_decode_intra_types;
     r->decode_mb_info     = rv40_decode_mb_info;
@@ -570,6 +570,7 @@ static av_cold int rv40_decode_init(AVCodecContext *avctx)
     r->luma_dc_quant_i = rv40_luma_dc_quant[0];
     r->luma_dc_quant_p = rv40_luma_dc_quant[1];
     ff_rv40dsp_init(&r->rdsp);
+    ff_thread_once(&init_static_once, rv40_init_tables);
     return 0;
 }
 
@@ -590,5 +591,6 @@ const AVCodec ff_rv40_decoder = {
         AV_PIX_FMT_NONE
     },
     .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
-    .caps_internal         = FF_CODEC_CAP_ALLOCATE_PROGRESS,
+    .caps_internal         = FF_CODEC_CAP_INIT_THREADSAFE |
+                             FF_CODEC_CAP_ALLOCATE_PROGRESS,
 };